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Pensions and Other Postretirement Benefit Plans (Tables)
9 Months Ended
Sep. 30, 2022
Retirement Benefits [Abstract]  
Schedule of Net Benefit Costs
The composition of the net periodic benefit cost for the nine months ended September 30, 2022 and 2021, was as follows:
Pension plans
Other postretirement benefits
(in thousands)
2022202120222021
Components of net periodic benefit cost:
Service cost
$1,061 $1,630 $86 $99 
Interest cost4,235 3,999 916 827 
Expected return on assets
(5,099)(4,802) — 
Amortization of prior service cost/(credit)(2)10 (3,366)(3,366)
Amortization of net actuarial loss
1,493 1,625 1,412 1,695 
Net periodic benefit cost/(credit)$1,688 $2,462 $(952)$(745)
Settlement charge49,128 —  — 
Net benefit cost/(credit)$50,816 $2,462 $(952)$(745)